GB899911A - Improvements in electrical circuit means for sensing a change in capacity between a probe and earth - Google Patents

Improvements in electrical circuit means for sensing a change in capacity between a probe and earth

Info

Publication number
GB899911A
GB899911A GB17308/59A GB1730859A GB899911A GB 899911 A GB899911 A GB 899911A GB 17308/59 A GB17308/59 A GB 17308/59A GB 1730859 A GB1730859 A GB 1730859A GB 899911 A GB899911 A GB 899911A
Authority
GB
United Kingdom
Prior art keywords
probe
earth
sensing
capacity
change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB17308/59A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BERTRAM FREDERICK MCCARTHY
Original Assignee
BERTRAM FREDERICK MCCARTHY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BERTRAM FREDERICK MCCARTHY filed Critical BERTRAM FREDERICK MCCARTHY
Priority to GB17308/59A priority Critical patent/GB899911A/en
Priority to US29916A priority patent/US3175151A/en
Priority to DEG29725A priority patent/DE1278744B/en
Priority to FR827767A priority patent/FR1257462A/en
Publication of GB899911A publication Critical patent/GB899911A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/483—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable capacitance detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage

Abstract

899,911. Measuring speed electrically. GURRY, G. W., and McCARTHY, B. F. May 20, 1960 [May 21, 1959], No. 17309/59. Class 40 (1). [Also in Group XXXVI] The speed of rotation of an earthed shaft 18 is sensed by the probe 17 and protuberance 19, the cyclic capacitance changes producing a pulse train at the same frequency over capacitor 22, which is amplified to drive a trigger circuit and square-wave generator energizing a frequency meter, indicating shaft speed.
GB17308/59A 1959-05-21 1959-05-21 Improvements in electrical circuit means for sensing a change in capacity between a probe and earth Expired GB899911A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB17308/59A GB899911A (en) 1959-05-21 1959-05-21 Improvements in electrical circuit means for sensing a change in capacity between a probe and earth
US29916A US3175151A (en) 1959-05-21 1960-05-18 Electrical circuit means for sensing an intermittent change in capacity between a probe and earth
DEG29725A DE1278744B (en) 1959-05-21 1960-05-20 Capacitive transmitter
FR827767A FR1257462A (en) 1959-05-21 1960-05-20 Electrical circuit for detecting a variation in capacitance between a probe and the earth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17308/59A GB899911A (en) 1959-05-21 1959-05-21 Improvements in electrical circuit means for sensing a change in capacity between a probe and earth

Publications (1)

Publication Number Publication Date
GB899911A true GB899911A (en) 1962-06-27

Family

ID=10092904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17308/59A Expired GB899911A (en) 1959-05-21 1959-05-21 Improvements in electrical circuit means for sensing a change in capacity between a probe and earth

Country Status (3)

Country Link
US (1) US3175151A (en)
DE (1) DE1278744B (en)
GB (1) GB899911A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638110A (en) * 1969-02-26 1972-01-25 Xerox Corp Device for measuring charge on a material by converting into electrical signals the frictional forces caused by the charge
DE2341073B2 (en) * 1973-08-10 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Measuring device for the voltage in an encapsulated high-voltage switchgear
US4839581A (en) * 1986-11-13 1989-06-13 Peterson Jr Thomas F Absolute electrical potential measuring apparatus and method
CA2486562A1 (en) * 2004-11-26 2006-05-26 Moustafa Mohamed Apparatus for determining the electric properties of a sample

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE678204C (en) * 1935-05-29 1939-07-10 Willy Bittorf Dipl Ing Arrangement for testing and measuring capacitors in an electron tube circuit
US2232959A (en) * 1939-07-29 1941-02-25 Cities Service Oil Co Electric rate meter
DE872643C (en) * 1944-10-07 1953-04-02 Pierre Buisson Device for measuring the change in distance between two elements by measuring the change in capacitance
US2611811A (en) * 1947-08-15 1952-09-23 Yates James Garrett Electrical measurement of physical effects, for example mechanical strains
DE828968C (en) * 1949-10-21 1952-01-21 Eberhard Adam Dipl Ing Method for the direct recording of aerological state curves, in particular by means of a radiosonde
GB720151A (en) * 1952-06-18 1954-12-15 Fielden Electronics Ltd Improvements relating to impedance measuring devices
US2766428A (en) * 1954-09-09 1956-10-09 Weston Electrical Instr Corp Capacitance measuring circuit

Also Published As

Publication number Publication date
DE1278744B (en) 1968-09-26
US3175151A (en) 1965-03-23

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